Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '322c214b17e2497e20862b16c0c0c5c411e9d50c6435caf123b88b130ffd5d82' 
  AND token = 'IstskEm1uw1oM30XFXA+A5IlL/OWw6QbPonYf7IMCoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}